Disable WordPress Search

disable-wordpress-search.php

/*
*
* Start of disabling Search Functionality, in case the request blocker is not active
*
* see also: https://instance-factory.com/?p=1706#disableSearch
*/

function ifb_filter_query($query)
{
    if (is_search()) {
        $query->is_search = false;
        $query->query_vars['s'] = false;
        $query->query['s'] = false;
    }
}
add_action('parse_query', 'ifb_filter_query', 1, 1);

add_filter('get_search_form', function ($a) {
    return '';
});

function ifb_remove_search_widget()
{
    unregister_widget('WP_Widget_Search');
}
add_action('widgets_init', 'ifb_remove_search_widget');

/*
* End of disabling Search Functionality
*/